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    <title>Document</title>
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    <script>
      function cssStyle2DomStyle(sName) {
        var arr = sName.split('-')

        for (var i = 0; i < arr.length; i++) {
          if (arr[i] == '') {
            arr.splice(i, 1)
            i--
          } else {
            if (i >= 1) {
              arr[i] = arr[i].substring(0, 1).toUpperCase() + arr[i].substring(1)
            }
          }
        }
        return arr.join('')
      }
      console.log(cssStyle2DomStyle('font-size'))
    </script>
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